Friis, R. H. (2012). Essentials of environmental health (2nd ed.). Jones & Bartlett Learning.
芝加哥风格引文Friis, Robert H. Essentials of Environmental Health. 2nd ed. Sudbury, MA: Jones & Bartlett Learning, 2012.
MLA引文Friis, Robert H. Essentials of Environmental Health. 2nd ed. Jones & Bartlett Learning, 2012.
警告：这些引文格式不一定是100％准确.